Tesla Launches Heat Pump Optimization for Powerwall 3 to Pair Solar with Thermal Storage

Tesla has introduced a "Heat Pump Optimization" feature in Europe for its Powerwall 3 and three-phase Powerwall 3P systems. By physically wiring the home battery to compatible heat pumps, the system monitors solar output and electricity tariffs, signaling the heat pump to boost heating when solar energy is surplus or grid rates are low. This thermal energy is stored in domestic hot water or buffer tanks, reducing electricity consumption during peak-rate periods and freeing battery capacity for other household loads. According to Tesla, the feature adopts the German Heat Pump Association (BWP) SG-Ready standard, communicating "normal" or "boost" operational suggestions via relay contacts rather than cloud integration. Deployment requires specific Powerwall firmware, an SG-Ready certified heat pump with SG-2 terminals, and installation by a certified technician. The heat pump's internal thermostat retains override priority, and the system defaults to normal mode during grid outages to protect backup power.

Key takeaways

• Tesla launched heat pump optimization in Europe, adjusting heating based on electricity prices and surplus solar output.
• The system uses the SG-Ready standard with physical relay wiring to provide operational recommendations, rather than cloud controls.
• Requirements include designated Powerwall 3/3P firmware, compatible SG-Ready heat pumps, the Tesla App, and certified installation.
• Domestic water tanks act as thermal storage to absorb daytime solar generation, preserving battery capacity for household electricity.